Image processing method and apparatus
AssigneeCanon Kabushiki Kaisha
InventorOsamu Tsujii
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Abstract
The present invention provides an image processing apparatus that constantly and efficiently obtains stable high-grade images. Sorting means sorts a target image into a first site and a second site. Extraction means and statistical-amount acquisition means extract the characteristic amounts of at least two pixels contained in at least either the first or second site and determine the statistical amount of the characteristic amounts for at least either the first or second site. Transformation means transforms pixel values based on the statistical amount. Dynamic-range compression processing is executed depending on the characteristic of the target image and in a manner optimal to the features of this image.
Claims15
An image processing method including a step of dynamic-range-compression processing of an image, wherein said dynamic-range compression processing step comprises:
- a segmentation step of extracting a first anatomical area and a second anatomical area from an input image by using an anatomical segmentation;
- a statistical-amount acquisition step of calculating a statistical amount of the first anatomical area, which is determined from a pixel value and a peripheral average pixel value;
- a conversion process condition acquisition step of calculating a conversion process condition for compressing a dynamic-range of the first anatomical area according to the statistical amount;
- and
- a conversion step of converting the input image which includes the first anatomical area and the second anatomical area by using the conversion process condition.
An image processing method including a step of dynamic-range-compression processing of an image, wherein said dynamic-range compression processing step comprises:
- a segmentation step of extracting a first anatomical area and a second anatomical area from an input image by using an anatomical segmentation;
- a statistical-amount calculation step of calculating a statistical amount which indicates a characteristic amount of a boundary portion between the first anatomical area and the second anatomical area;
- a conversion process condition acquisition step of calculating a conversion process condition according to the statistical amount;
- and
- a conversion step of converting the input image data by using the conversion process condition.
An image processing apparatus for dynamic-range-compression processing of an image, comprising:
- a segmentation unit that extracts a first anatomical area and a second anatomical area from an input image by using an anatomical segmentation;
- a statistical-amount acquisition unit that calculates a statistical amount of the first anatomical area, which is determined from a pixel value and a peripheral average pixel value;
- a conversion process condition acquisition unit which calculates a conversion process condition for compressing a dynamic-range of the first anatomical area according to the statistical amount;
- and
- a conversion unit which converts the input image which includes the first anatomical area and the second anatomical area by using the conversion process condition.
An image processing apparatus for dynamic-range-compression processing of an image, comprising:
- a segmentation unit that extracts a first anatomical area and a second anatomical area from an input image by using an anatomical segmentation;
- a statistical-amount calculation unit that calculates a statistical amount which indicates a characteristic amount of a boundary portion between the first anatomical area and the second anatomical area;
- a conversion process condition acquisition unit which calculates a conversion process condition according to the statistical amount;
- and
- a conversion unit that converts the input image data by using the conversion process condition.
Dependencies are inferred from the claim text.